大学校长体育知行观对大学体育文化的扩散路径研究

大学校长体育知行观包括主体认知和行为践行两个方面,并最终形成知行和谐。主体认知是指大学校长对于体育的价值判断和文化解读;行为践行是指大学校长根据一定的理念、理论、计划和方案制定政策从事于变革大学体育文化的客观现实活动,并身体力行参与体育实践,继而发挥校长自身影响力导向和影响师生热爱体育运动,构建和谐大学体育文化。     

基于神经网络的半导体扩散炉温度控制研究

针对半导体扩散炉温度控制问题,提出神经网络控制方法.神经网络采用3-3-3结构.仿真表明,此控制方法是可行的,具有良好的控制品质.     

Measurement of soluble solids content in watermelon by Vis/NIR diffuse transmittance technique

INTRODUCTION Determination of fruit and vegetable quality is very important for both producers and processors. Watermelon as a delicious fruit has been widely ac-cepted in the world and its internal quality is impor-tant for consumers and merchants. The current fa-vorite way for checking a watermelon is to sense sound or vibration by slapping or rapping it. It is time consuming, tedious, and subject to error. Several studies on assessing the quality of watermelon based on its acoustic o…     

北魏儒风与河西文化之东渐

以凉州为中心的河西文化,随着北魏儒风的高涨而逐渐东传,并与中原文化及北渐的江左文化相融合,形成以儒学为核心的多元文化,从而奠定了隋唐文化繁荣的基础。河西文化的东渐及融合,对中国文化的发展,中华民族的演进,以及中国历史的进程均有深远影响。     

简单光反射模型(Phong模型)的导出

简单光反射模型只考虑物体对直接光照的反射作用,而物体间的光反射作用,只用环境光来表示,Phong模型即为这样的一种模型。本文分别从光反射作用的各个组成部分来导出Phong模型。     

Review of several optical non-destructive analyses of an easel painting. Complementarity and crosschecking of the results

Five optical analyses of a given work of art are presented, using multispectral imaging, optical coherence tomography, goniophometry, UV-fluorescence emission spectroscopy and diffuse reflectance spectroscopy. All these methods are non-destructive, contactless, and implementable in situ. They all lead to results in quasi-real time. The multispectral camera allows imaging of the whole painting with very high definition and recording of 240 millions of spectra. Optical coherence tomography allows local 2D and 3D imaging with in-face and in depth stratigraphies inside the painting with a micrometric accuracy. It allows the evaluation of the pigment volume concentration inside a layer, the measurement of the thickness of one or two varnish layers, the detection and measurements of gaps inside the paint layer, the depth of varnish micro-cracks. Goniophotometry allows the measurement of the upper surface state of the painting in different locations, by quantifying the mean slope of the facets making up the surface. UV-fluorescence emission spectroscopy allows the identification of the resin, the binder and the ageing state of varnishes by use of databases of reference varnishes. Diffuse reflectance spectroscopy leads to pigment, pigment mixture and dye identifications again by use of databases. The three last methods are implemented with the same portable multi-function instrument. It allows time saving, locations on request in front of the artwork and easy use by non-scientists. Each instrument is described with its protocol and accuracy. The studied painting is a portrait of a lady painted by the Austrian artist Franz Strotszberg, chosen for its several restorations. The five kinds of results are successively detailed, analysed and compared between themselves. It is shown that the different results are complementary and their crosschecking brings thorough information. For example, the shape of the network of varnish micro-cracks detected on the surface with the multispectral camera is added to the measurement of their depth with optical coherence tomography. Another example allows connecting two different surface states of the upper varnished surface measured by goniophotometry with the identification of these varnish with UV-fluorescence and with their thicknesses measured with optical coherence tomography.     

铯蒸气中产生的1（a）~3Σ_u~＋→2~3∏_g（0_g~（＋,-）,1_g,2_g）扩散带

分析了在采用高分辨的多通道光谱仪AvaSpec-2048FT对铯分子蒸汽吸收光谱进行测量时观测到了奇特的扩散带吸收谱线,中心在706.6 nm、713.2 nm和719.0 nm,对应铯分子1（a）~3Σ_u~＋→2~3∏_g（0_g~（＋,-）,1_g,2_g）三重态的跃迁,并对扩散带吸收系数随温度的变化进行了讨论。